It is not possible to separate Hammada Iljin and Haloxylon Bunge as the two genera often form a continuum in their characters. Consequently, Hedge (l.c., 1997) retained the broad generic circumscription of Haloxylon Bunge and included most of the taxa within it. We have also adopted the same broader circumscription and placed all our species under Haloxylon.

Some of our taxa have also been placed in the genus Arthrophytum Schrenk, but it is not possible to separate them from our generic circumscription of Haloxylon.